WAEC Mathematics questions: Sets

22 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Sets· WAEC

   A is a subset of B, n(A) = 7 and n(B) = 15. Find n(A ∪ B).

   • A8
   • B22
   • C7
   • D15

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   Explanation and discussion

2. Question 22· Sets· WAEC

   If U = {a, b, c, d, e} and A = {a, c, e}, find A′.

   • A{b, d}
   • B{a, c, e}
   • C{b, c, d}
   • D{ }

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   Explanation and discussion